. >>> candidate clash, president obama and mitt romney nearly clash as they cross key battleground states. >>> and under the sea. google takes its virtual street >>> and under the sea. google takes its virtual street view to incredible new depths. captions paid for by nbc-universal television >>> hello and good morning. i'm lynn berry. and today we begin with game on. late last night the nfl reached a tentative deal with its referees and that ended this season's lockout. anger over the use of replacement refs spilled over after monday night's contest between the green bay packers and seattle seahawks. the fill in refs awarded a game-winning touchdown to seattle though many felt the packers had made an interception. well, two days of marathon labor negotiations followed. the refs still have to vote on the deal, but commissioner roger goodell has lifted the lockout just in time for tonight's match-up between the cleveland browns and baltimore ravens. nbc's fred roggin will have full details coming up in sports. >>> first president obama and presidential candidate mitt romney both campaigned